Wind cap capable of preventing wind from flowing backwards
By installing a flow converter on the wind cap to change the airflow direction, the problems of backflow and high exhaust resistance are solved, achieving effective wind cap protection and exhaust gas discharge.
Patent Information
- Application Number
- CN202520352710.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-03
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-03
AI Technical Summary
The existing wind cap structure has problems with backflow of natural wind and high exhaust resistance.
A converter plate is installed above the rain cover of the windshield, with an angle of 0° between the converter plate and the rain cover.
It effectively prevents natural wind from flowing back into the hood, reduces exhaust resistance, and improves exhaust gas discharge efficiency.
Smart Images
Figure CN223853766U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of exhaust duct system technology, and more specifically, relates to a windproof backflow hood. Background Technology
[0002] A vent cap, used on the roof of a building's exhaust duct system, serves to prevent natural wind, rain, and snow from flowing back into the exhaust duct, while facilitating the discharge of exhaust gases. However, existing vent cap structures do not adequately address the issues of natural wind backflow and high exhaust resistance.
[0003] For example, such as Figure 1 , Figure 2 As shown, the arrow indicates the direction of natural airflow. When using the existing wind cap, natural air flows back into the wind cap from the air outlet, blocking the gas from being discharged. Utility Model Content
[0004] The purpose of this application is to provide a windproof cap that prevents backflow, thereby solving the technical problems of backflow and high exhaust resistance in existing caps.
[0005] To achieve the above objectives, the technical solution adopted in this application embodiment is: a windproof backflow hood, installed at the air outlet of the exhaust duct, including a base with an air inlet, a rainproof cover plate disposed above the air inlet, a windproof device disposed beside the rainproof cover plate, and a fixing device connecting the base, the rainproof cover plate, and the windproof device. An air outlet channel communicating with the air inlet is provided between the rainproof cover plate and the windproof device. An inclined flow converter plate is provided above the rainproof cover plate, and the angle between the side of the flow converter plate facing the air outlet channel and the rainproof cover plate is α, 0°. <a<90°。
[0006] Specifically, the converter plate is a flat plate, a curved plate, or an irregularly shaped plate.
[0007] Specifically, the rain cover is a flat plate, a curved plate, or an irregularly shaped plate.
[0008] Specifically, there are multiple converter plates, which are arranged at intervals.
[0009] Specifically, the converter plate includes a plurality of first converter plates and a plurality of second converter plates, wherein the plurality of first converter plates and the plurality of second converter plates are staggered.
[0010] Specifically, a drainage hole is provided between the converter plate and the rain cover plate.
[0011] Specifically, the converter plate is fixed to the rain cover, or to the windproof device, or to the fixing device.
[0012] Specifically, the windshield device is provided with a through hole connecting the air outlet channel and the outside, and a normally closed check plate is hinged at the through hole.
[0013] In this application, a flow-changing plate is arranged above the rain shield cover. The included angle between the side of the flow-changing plate facing the air outlet channel and the rain shield cover is α, where 0° < α < 90°. Through the action of the flow-changing plate, the natural wind changes its flow direction, preventing backflow into the wind cap and blocking the exhaust of waste gas, and greatly reducing the exhaust resistance. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0015] Figure 1 Schematic cross-section of the wind cap in the prior art Figure 1 ;
[0016] Figure 2 Schematic cross-section of another view of the wind cap in the prior art Figure 2 ;
[0017] Figure 3 Schematic plan view of the wind cap provided in Embodiment 1 of the present application;
[0018] Figure 4 For Figure 3 the cross-sectional view;
[0019] Figure 5 Schematic plan view of the wind cap provided in Embodiment 2 of the present application;
[0020] Figure 6 For Figure 5 the cross-sectional view;
[0021] Figure 7 Schematic plan view of the rain shield cover provided in Embodiment 3 of the present application.
[0022] Among them, the reference numerals in the drawings are as follows: <00……
[0023] 10 - base; 11 - air inlet; 12 - rain shield cover; 13 - windshield device; 14 - fixing device; 15 - air outlet channel; 16 - flow-changing plate; <161 - first flow-changing plate; 162 - second flow-changing plate>; 18 - seat body; 19 - fixing part. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0025] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.
[0028] Example 1
[0029] See Figure 3 , Figure 4 This application provides a windproof backflow hood, which is installed at the air outlet of an exhaust duct (not shown in the figure) to allow exhaust gas in the exhaust duct to be smoothly discharged from the air outlet, while preventing external gas or rain / snow from entering the exhaust duct and causing backflow. The windproof backflow hood includes a base 10 with an air inlet 11, a rain cover 12 disposed above the air inlet 11, a windproof device 13 disposed beside the rain cover 12, and a fixing device 14 connecting the base 10, the rain cover 12, and the windproof device 13. An air outlet channel 15 communicating with the air inlet 11 is provided between the rain cover 12 and the windproof device 13. An inclined flow converter 16 is provided above the rain cover 12, and the angle between the side of the flow converter 16 facing the air outlet channel 15 and the rain cover 12 is α, 0°. <a<90°。
[0030] Depend on Figure 4It can be seen that in the present application, a flow deflector 16 is provided above the rain shield 12. The included angle α between the side of the flow deflector 16 facing the air outlet channel 15 and the rain shield 12 satisfies 0° < α < 90°. Due to the effect of the flow deflector 16, the natural wind changes its flow direction, preventing backflow into the wind cap and blocking the exhaust of waste gas, thus greatly reducing the exhaust resistance.
[0031] In this embodiment, the flow deflector 16 is a flat plate, and the rain shield 12 is also a flat plate, so the forming process is simple and the cost is low. Of course, the flow deflector 16 can also be a curved plate or a plate with an irregular shape, and the rain shield 12 can also be a curved plate or a plate with an irregular shape.
[0032] In this embodiment, the flow deflector 16 is directly fixed to the rain shield 12. The flow deflector 16 can also be fixed to the wind blocking device 13 or the fixing device 14, as long as the flow deflector 16 is located above the rain shield 12 and the included angle α between the side of the flow deflector 16 facing the air outlet channel 15 and the rain shield 12 satisfies 0° < α < 90°.
[0033] In this embodiment, the rain shield 12 is a rectangular plate, and there are four flow deflectors 16, which are respectively arranged at the four side edges of the rectangular plate, and the adjacent flow deflectors 16 are arranged at intervals. In this way, the rain received by the rain shield 12 flows out from the intervals between the adjacent flow deflectors 16.
[0034] In other embodiments, a through hole (not shown in the figure) communicating with the air inlet 11 can also be provided on the wind blocking device 13, and a normally closed check valve plate (not shown in the figure) is hinged at the through hole. In this way, the airflow discharged from the exhaust duct blows open the normally closed check valve plate, increasing the side air outlet area and being more beneficial to the exhaust of waste gas.
[0035] In this embodiment, the base 10 includes a hollow seat body 18 and a fixing portion 19 extending outward along the edge of the seat body 18. The air inlet 11 is provided on the base 10, and screw holes (not marked in the figure) are provided on the fixing portion 19 for fixing the fixing portion 19 to the supporting surface through bolts.
[0036] Embodiment Two
[0037] Refer to Figure 5 、 Figure 6 The difference between the wind cap for preventing wind backflow provided in this Embodiment Two and Embodiment One is as follows:
[0038] First, the whole wind cap for preventing wind backflow is cylindrical, the rain shield 12 is a circular plate, and the flow deflector 16 is a circular curved plate, that is, the inner surface of the flow deflector 16 is a curved surface.
[0039] Second, in this embodiment, the flow deflectors 16 are connected as a whole, there is no gap in the circular flow deflectors 16, and drainage holes (not shown in the figure) are provided between the flow deflectors 16 and the rain shield 12 to facilitate the discharge of the rain received by the rain shield 12.
[0040] Other similarities between this embodiment and Embodiment 1 will not be repeated here.
[0041] Example 3
[0042] Reference Figure 7 This embodiment three provides a windproof backflow hood, whose other structures differ from those of embodiment one and are not shown in the figures. The rain cover 12 shown in embodiment three has a rectangular structure. The converter plate 16 includes four first converter plates 161 and four second converter plates 162. The structures of the first converter plates 161 and the second converter plates 162 are different. The first converter plates 161 are flat and located at the edge of the rain cover 12, while the second converter plates 162 have a U-shaped cross-section and are located at the four corners of the rain cover 12. The four first converter plates 161 and the four second converter plates 162 are staggered, so that rainwater is discharged from the staggered points. The arrows in the figures indicate the direction of rainwater discharge.
[0043] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application.
Claims
1. A windproof and anti-inversion cap arranged at an air outlet of an air exhaust passage, comprising a base having an air inlet, a rain cover arranged above the air inlet, a wind blocking device arranged beside the rain cover, and a fixing device connecting the base, the rain cover and the wind blocking device, and an air outlet channel in communication with the air inlet is arranged between the rain cover and the wind blocking device, characterized in that: The rain cover is provided with a variable flow plate arranged obliquely above the rain cover, and an angle between a side of the variable flow plate facing the air outlet channel and the rain cover is a, and 0° < a < 90°.
2. The wind-repelling, wind-mantle of claim 1, wherein: The variable flow plate is a flat plate or a curved plate.
3. The wind-repelling, wind-mantle of claim 1, wherein: The rain cover is a flat plate or a curved plate.
4. The wind-repelling, reverse-wind gaiter of claim 1, wherein: The variable flow plate is a plurality of variable flow plates arranged at intervals.
5. The wind-repelling, reverse-wind gaiter of claim 1, wherein: The variable flow plate comprises a plurality of first variable flow plates and a plurality of second variable flow plates, and the plurality of first variable flow plates and the plurality of second variable flow plates are arranged at intervals.
6. The wind-repelling, reverse-wind gaiter of claim 1, wherein: A drain hole is arranged between the variable flow plate and the rain cover.
7. The wind-repelling, reverse-wind gaiter of claim 1, wherein: The variable flow plate is fixed to the rain cover, or fixed to the wind shielding device, or fixed to the fixing device.
8. The wind-repelling, reverse-wind gaiter of claim 1, wherein: The wind shielding device is provided with a through hole communicating with the air outlet channel and the outside, and a normally closed check plate is hinged at the through hole.